1887
banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
A more accurate reconstruction system matrix for quantitative proton computed tomography
Rent:
Rent this article for
USD
10.1118/1.3218759
/content/aapm/journal/medphys/36/10/10.1118/1.3218759
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/36/10/10.1118/1.3218759

Figures

Image of FIG. 1.
FIG. 1.

Conceptual illustration of the MLP formalism. The bold line represents the MLP, while the faint line corresponds to a proton undergoing exaggerated multiple Coulomb scattering.

Image of FIG. 2.
FIG. 2.

Plot of the derived effective mean chord length as a function of pixel rotation angle.

Image of FIG. 3.
FIG. 3.

Schematic of the GEANT4 simulation geometry used to model an ideal pCT system.

Image of FIG. 4.
FIG. 4.

(a) The Herman head phantom. Reconstructed images corresponding to the cycle of minimum relative error with (b) constant chord length, (c) exact chord length, and (d) effective mean chord length.

Image of FIG. 5.
FIG. 5.

Distribution of reconstructed relative stopping powers with constant chord length, exact chord length, and effective mean chord lengths.

Image of FIG. 6.
FIG. 6.

Schematic of the rotated pixel geometry. The pixel vertices are denoted by points A, B, C, and D. The linear functions joining these points are labeled , , , and . A simplified straight line proton path is given as an example, illustrating the discrete stepping nature of the MLP. The step size is denoted by . The chord length for this example is shown in bold.

Image of FIG. 7.
FIG. 7.

Derivation of the point on the axis at which the chord length through a pixel is equal to the step size of the MLP procedure. Through symmetry, the same method can be used to derive for the positive axis.

Tables

Generic image for table
TABLE I.

Results of a Guassian fit to histograms of reconstructed bone and brain regions in the relative stopping power images. The mean value with 95% confident limit and standard deviation are given.

Loading

Article metrics loading...

/content/aapm/journal/medphys/36/10/10.1118/1.3218759
2009-09-09
2014-04-17
Loading

Full text loading...

This is a required field
Please enter a valid email address
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: A more accurate reconstruction system matrix for quantitative proton computed tomography
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/36/10/10.1118/1.3218759
10.1118/1.3218759
SEARCH_EXPAND_ITEM